ALPINESTARS Nucleon KR-Cell Back Protector - XL 6504018-13-XL

Back injuries from impacts can end a racing career or sideline a rider indefinitely—the Nucleon KR-Cell is engineered to prevent that. This back protector delivers multi-layer impact absorption without the bulk, using a lightweight polymeric blend that moves with your body rather than against it. Whether you're logging track days or competing at the professional level, the KR-Cell keeps you protected and comfortable for the duration of your session.

The triple-layer construction absorbs energy across a wide impact zone, while horizontal flexion grooves allow the protector to conform to your spine's natural movement. Highly perforated shells maximize airflow to prevent heat buildup during intense riding, and the soft bio-foam chassis eliminates pressure points that cause fatigue. Adjustable shoulder straps and a dual hook-and-loop kidney belt ensure a secure, personalized fit that won't shift under acceleration or braking.

• MPN: 650401813XL
• Size: XL
• Triple-layer impact absorption
• High-performance polymeric construction
• Highly perforated shells
• Horizontal flexion grooves
• Soft bio-foam chassis
• Adjustable elastic shoulder straps
• Detachable strap design
• Dual hook-and-loop closure
• Compatible with Nucleon KR-C
• Lightweight and flexible
• Enhanced breathability
• Ergonomic contoured fit